There's a hidden language that's part of the GSM standard that can unlock hidden features on your smartphone. You can dial ...

By entering certain strings of numbers and symbols into your phone's dialer, you can gain access to a world of hidden ...

Android short codes: the basics Android secret short codes are numbers you dial to access hidden menus or actions on your phone.

If you don't own an iPhone, Pixel, or Samsung, another way you can find your SIM card's ICCID number is by using the secret short codes for Android, particularly the Man-Machine Interface (MMI) code.

If calls were automatically flagged as spam by your Android phone or you directly blocked them, attempts to communicate with you are automatically dropped.